Load Specifications
Bullet Manufacturer:Discreet Ballistics
Bullet Weight:280 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Blaser Mag. load data
Case Length (l3):2.5078"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:92.6 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:25.6"
Max. allowed Pressure:60,916 psi
Load data in caliber .338 Blaser Mag. with .338 | 280gr | Discreet Ballistics Selous Machined Expander bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Accurate High Country.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 54,940 psi | 90% | 2320 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 52,924 psi | 87% | 2346 fps | 99.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,327 psi | 81% | 2388 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 51,895 psi | 85% | 2329 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 51,866 psi | 85% | 2428 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 53,534 psi | 88% | 2562 fps | 98.5% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 50,850 psi | 83% | 2510 fps | 96.7% |
| ADI AR 2206H | <<locked>> | 82% | 54,549 psi | 90% | 2395 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 52,446 psi | 86% | 2362 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 52,968 psi | 87% | 2467 fps | 98.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 50,647 psi | 83% | 2461 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,462 psi | 89% | 2513 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 52,765 psi | 87% | 2464 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 52,823 psi | 87% | 2379 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,084 psi | 87% | 2398 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 52,837 psi | 87% | 2474 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 53,853 psi | 88% | 2497 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,011 psi | 85% | 2457 fps | 98.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,095 psi | 81% | 2464 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,209 psi | 76% | 2402 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,524 psi | 67% | 2346 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,547 psi | 86% | 2569 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,259 psi | 89% | 2418 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 44,976 psi | 74% | 2398 fps | 97.7% |
| Bofors RP3 | <<locked>> | 86% | 53,548 psi | 88% | 2395 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,095 psi | 81% | 2464 fps | 98.6% |
| Bofors RP7 | <<locked>> | 90% | 53,185 psi | 87% | 2385 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 86% | 54,056 psi | 89% | 2411 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 54,230 psi | 89% | 2474 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 90% | 54,346 psi | 89% | 2438 fps | 99.2% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 54,215 psi | 89% | 2461 fps | 97.4% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 53,127 psi | 87% | 2448 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,011 psi | 87% | 2405 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 51,532 psi | 85% | 2392 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 39,653 psi | 65% | 2369 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 92% | 54,128 psi | 89% | 2510 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,216 psi | 59% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 52,982 psi | 87% | 2362 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 51,924 psi | 85% | 2343 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,636 psi | 90% | 2379 fps | 99.7% |
| IMR 4350 | <<locked>> | 94% | 53,751 psi | 88% | 2415 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,853 psi | 90% | 2408 fps | 99.7% |
| IMR 4831 | <<locked>> | 94% | 52,373 psi | 86% | 2418 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 54,476 psi | 89% | 2421 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,692 psi | 87% | 2408 fps | 97.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 47,979 psi | 79% | 2434 fps | 97% |
| Lovex D073.6 | <<locked>> | 82% | 54,911 psi | 90% | 2372 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,824 psi | 88% | 2329 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 51,996 psi | 85% | 2336 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,694 psi | 90% | 2405 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 52,344 psi | 86% | 2398 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,031 psi | 67% | 2267 fps | 98.9% |
| Norma 201 | <<locked>> | 82% | 53,563 psi | 88% | 2346 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,215 psi | 89% | 2343 fps | 100% |
| Norma 203B | <<locked>> | 84% | 52,373 psi | 86% | 2385 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,099 psi | 89% | 2461 fps | 98.9% |
| Norma MRPᴾ | <<locked>> | 100% | 51,750 psi | 85% | 2533 fps | 99.7% |
| Norma URP | <<locked>> | 94% | 54,114 psi | 89% | 2457 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 52,779 psi | 87% | 2411 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 47,906 psi | 79% | 2444 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 94% | 52,837 psi | 87% | 2464 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 42,598 psi | 70% | 2343 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,811 psi | 60% | 1480 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 53,925 psi | 89% | 2398 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,940 psi | 89% | 2457 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 53,432 psi | 88% | 2487 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 51,474 psi | 85% | 2451 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 53,679 psi | 88% | 2520 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 39,088 psi | 64% | 2359 fps | 97.8% |
| Rottweil R 902 | <<locked>> | 84% | 54,215 psi | 89% | 2346 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,417 psi | 88% | 2388 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 54,694 psi | 90% | 2438 fps | 98.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,752 psi | 90% | 2493 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 90% | 53,185 psi | 87% | 2385 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,694 psi | 90% | 2405 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,911 psi | 90% | 2372 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 51,996 psi | 85% | 2336 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 52,344 psi | 86% | 2398 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,114 psi | 90% | 2444 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,069 psi | 87% | 2375 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,476 psi | 89% | 2280 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,013 psi | 90% | 2283 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,346 psi | 89% | 2362 fps | 99.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,288 psi | 89% | 2487 fps | 99.2% |
| Somchem S335 | <<locked>> | 82% | 54,215 psi | 89% | 2283 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,650 psi | 88% | 2385 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 52,779 psi | 87% | 2388 fps | 97.1% |
| Somchem S365 | <<locked>> | 96% | 52,982 psi | 87% | 2457 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 51,793 psi | 85% | 2425 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 82% | 54,969 psi | 90% | 2264 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,157 psi | 89% | 2303 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,476 psi | 89% | 2323 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,723 psi | 90% | 2362 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 52,982 psi | 87% | 2408 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 47,848 psi | 79% | 2359 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 84% | 52,591 psi | 86% | 2326 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 52,011 psi | 85% | 2418 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,851 psi | 85% | 2467 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 52,388 psi | 86% | 2523 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 52,446 psi | 86% | 2382 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,230 psi | 89% | 2474 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,568 psi | 68% | 2457 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,055 psi | 87% | 2382 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 51,692 psi | 85% | 2415 fps | 98.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 48,588 psi | 80% | 2244 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,586 psi | 76% | 2257 fps | 98.4% |
| Accurate 3100 | <<locked>> | 84% | 28,747 psi | 47% | 2024 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 46,006 psi | 76% | 2254 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,534 psi | 57% | 2152 fps | 98.9% |
| Accurate High Country | 63 gr | 92% | 40,712 psi | 67% | 2356 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 96% | 44,324 psi | 73% | 2405 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 51,314 psi | 84% | 2352 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,729 psi | 72% | 2238 fps | 100% |
| ADI AR 2209 | <<locked>> | 88% | 38,624 psi | 63% | 2231 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 94% | 41,684 psi | 68% | 2313 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,456 psi | 78% | 2415 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 36,289 psi | 60% | 2188 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,005 psi | 72% | 2257 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,920 psi | 77% | 2313 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,243 psi | 56% | 2165 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,319 psi | 63% | 2267 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 35,911 psi | 59% | 2185 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 90% | 35,520 psi | 58% | 2221 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,947 psi | 41% | 1969 fps | 97.2% |
| Alliant Reloder-25 | <<locked>> | 88% | 28,181 psi | 46% | 2064 fps | 95.2% |
| Alliant Reloder-26 | 56.5 gr | 80% | 26,252 psi | 43% | 2057 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,865 psi | 84% | 2372 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 37,289 psi | 61% | 2257 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 44,005 psi | 72% | 2267 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 35,520 psi | 58% | 2221 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 38,972 psi | 64% | 2162 fps | 97% |
| Hodgdon H380 | <<locked>> | 80% | 44,541 psi | 73% | 2277 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 36,593 psi | 60% | 2195 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 39,697 psi | 65% | 2208 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 94% | 44,541 psi | 73% | 2320 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 43,671 psi | 72% | 2303 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,662 psi | 52% | 2073 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,428 psi | 80% | 2352 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 37,304 psi | 61% | 2320 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 35,418 psi | 58% | 2201 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 45% | 1289 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,574 psi | 81% | 2320 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,006 psi | 76% | 2260 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,124 psi | 79% | 2287 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 34,737 psi | 57% | 2103 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,495 psi | 66% | 2192 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 33,431 psi | 55% | 2116 fps | 98.7% |
| IMR 4895 | <<locked>> | 80% | 48,124 psi | 79% | 2336 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 43,888 psi | 72% | 2274 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 42,250 psi | 69% | 2336 fps | 95.4% |
| Lovex D073.6 | <<locked>> | 80% | 51,314 psi | 84% | 2329 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,647 psi | 83% | 2290 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,108 psi | 76% | 2260 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,058 psi | 62% | 2149 fps | 98.5% |
| Lovex S070 | <<locked>> | 80% | 36,143 psi | 59% | 2133 fps | 97.1% |
| Lovex S071 | <<locked>> | 88% | 28,021 psi | 46% | 2008 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 50,372 psi | 83% | 2306 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,937 psi | 84% | 2303 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,282 psi | 76% | 2303 fps | 100% |
| Norma 204 | <<locked>> | 84% | 38,769 psi | 64% | 2221 fps | 95.7% |
| Norma MRP | <<locked>> | 86% | 32,474 psi | 53% | 2182 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 34,534 psi | 57% | 2149 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 80% | 46,180 psi | 76% | 2323 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 41,785 psi | 69% | 2339 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 33,489 psi | 55% | 2139 fps | 97% |
| Ramshot Magnum | <<locked>> | 94% | 34,505 psi | 57% | 2188 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 45% | 1319 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,512 psi | 73% | 2264 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,285 psi | 83% | 2408 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,727 psi | 67% | 2306 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,113 psi | 56% | 2169 fps | 98.6% |
| ReloadSwiss RS 70 | 55.9 gr | 80% | 33,460 psi | 55% | 2175 fps | 98% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 34,200 psi | 56% | 2247 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 47,848 psi | 79% | 2267 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,365 psi | 68% | 2221 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 40,132 psi | 66% | 2215 fps | 95% |
| Rottweil R 905 | <<locked>> | 88% | 36,927 psi | 61% | 2211 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 38,972 psi | 64% | 2162 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,058 psi | 62% | 2149 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,314 psi | 84% | 2329 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,108 psi | 76% | 2260 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,143 psi | 59% | 2133 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,351 psi | 70% | 2267 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,690 psi | 82% | 2329 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,372 psi | 84% | 2244 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,250 psi | 71% | 2139 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,130 psi | 61% | 2100 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 36,579 psi | 60% | 2205 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 50,995 psi | 84% | 2244 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,989 psi | 69% | 2224 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 46,340 psi | 76% | 2297 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 31,082 psi | 51% | 2116 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 32,982 psi | 54% | 2106 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 51,880 psi | 85% | 2228 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,138 psi | 79% | 2234 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,095 psi | 79% | 2244 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,871 psi | 65% | 2162 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,940 psi | 59% | 2146 fps | 99% |
| Vihtavuori N165 | <<locked>> | 90% | 34,679 psi | 57% | 2136 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 46,543 psi | 76% | 2247 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,476 psi | 58% | 2152 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 80% | 27,021 psi | 44% | 2031 fps | 97.3% |
| Vihtavuori N560 | <<locked>> | 94% | 43,004 psi | 71% | 2372 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,128 psi | 58% | 2123 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 36,593 psi | 60% | 2195 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 21,930 psi | 36% | 1942 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,676 psi | 82% | 2339 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 36,927 psi | 61% | 2182 fps | 95.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 104 powders for .338 Blaser Mag. loaded with the .338 | 280gr | Discreet Ballistics Selous Machined Expander. Alliant Reloder-26 delivers the highest muzzle velocity at 2,569 fps; across all powders the maximum-charge window runs from 1,444 fps to 2,569 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. Accurate 3100, Accurate High Country, Accurate MAGPRO reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Reloder-26, ReloadSwiss RS 70, Accurate High Country rank at the top here: for .338 Blaser Mag. with the .338 | 280gr | Discreet Ballistics Selous Machined Expander they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.